Revert sales invoice dn link issue
diff --git a/erpnext/accounts/doctype/sales_invoice/sales_invoice_dashboard.py b/erpnext/accounts/doctype/sales_invoice/sales_invoice_dashboard.py
index bfe00ef..bc9d766 100644
--- a/erpnext/accounts/doctype/sales_invoice/sales_invoice_dashboard.py
+++ b/erpnext/accounts/doctype/sales_invoice/sales_invoice_dashboard.py
@@ -11,8 +11,7 @@
 			'Sales Invoice': 'return_against'
 		},
 		'internal_links': {
-			'Sales Order': ['items', 'sales_order'],
-			'Delivery Note': ['items', 'delivery_note']
+			'Sales Order': ['items', 'sales_order']
 		},
 		'transactions': [
 			{